// Copyright (c) 2008-2010, Arne Claus
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are permitted provided that the 
// following conditions are met:
//
// - Redistributions of source code must retain the above copyright notice, this list of conditions and the following 
//   disclaimer.
// - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following 
//   disclaimer in the documentation and/or other materials provided with the distribution.
// - Neither the name Arne Claus nor the names of any contributors may be used to endorse or promote products
//   derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 
// USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef __INCLUDED_CBL_FILEHANDLE_H__
#define __INCLUDED_CBL_FILEHANDLE_H__

#include "CBL_Defines.h"
#include "CBL_SmartPtr.h"

CB_NAMESPACE_START

class IFileHandle
{
public:
	
	enum ESeekPosition
	{
		FromStart = 0,
		FromCursor,
		FromEnd
	};
	
public:

	virtual void Close() = 0;
	virtual void* GetNativeHandle() const = 0;
	
	virtual void Seek(int32 _Position, ESeekPosition _From) const = 0;
	virtual uint32 GetFileSizeByte() const = 0;
	
	virtual uint32 Read(char* _pBuffer, uint32 _Byte) const = 0;
	virtual void Write(const char* _pBuffer, uint32 _Byte) const = 0;
};

typedef CSmartPtr<IFileHandle> CFileHandlePtr;

CB_NAMESPACE_END

#endif